35124135721 has 2 divisors, whose sum is σ = 35124135722. Its totient is φ = 35124135720.

The previous prime is 35124135719. The next prime is 35124135763. The reversal of 35124135721 is 12753142153.

35124135721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18935136025 + 16188999696 = 137605^2 + 127236^2 .

It is an emirp because it is prime and its reverse (12753142153) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 35124135721 - 2¹ = 35124135719 is a prime.

Together with 35124135719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (35124135701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17562067860 + 17562067861.

It is an arithmetic number, because the mean of its divisors is an integer number (17562067861).

Almost surely, 2^35124135721 is an apocalyptic number.

It is an amenable number.

35124135721 is a deficient number, since it is larger than the sum of its proper divisors (1).

35124135721 is an equidigital number, since it uses as much as digits as its factorization.

35124135721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 34.

Adding to 35124135721 its reverse (12753142153), we get a palindrome (47877277874).

The spelling of 35124135721 in words is "thirty-five billion, one hundred twenty-four million, one hundred thirty-five thousand, seven hundred twenty-one".